66487162919 has 4 divisors (see below), whose sum is σ = 66488277960. Its totient is φ = 66486047880.

The previous prime is 66487162909. The next prime is 66487163027. The reversal of 66487162919 is 91926178466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66487162919 is a prime.

It is a super-2 number, since 2×66487162919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66487162909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462704 + ... + 589125.

It is an arithmetic number, because the mean of its divisors is an integer number (16622069490).

Almost surely, 2^66487162919 is an apocalyptic number.

66487162919 is a deficient number, since it is larger than the sum of its proper divisors (1115041).

66487162919 is a wasteful number, since it uses less digits than its factorization.

66487162919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115040.

The product of its digits is 7838208, while the sum is 59.

The spelling of 66487162919 in words is "sixty-six billion, four hundred eighty-seven million, one hundred sixty-two thousand, nine hundred nineteen".